I just upgraded my Toshiba Satellite M155 S3154 laptop from its original intel model WM3945ABG wireless card to the intel 4965AGN. I added a new Trendnet 300 Mbps Wireless Easy-N-Upgrader TEW-637AP wireless access point. I installed the latest 4965AGN driver and the latest firmware for the WAP. I followed the directions for the WAP to allow for G/N communications - I still have one laptop that uses G. I tested all 11 channels to see which channel provides the best communications. There was really no difference in the 11 channels so I set the channel to "auto". After doing all these tasks, i get no higher then 74 Mbps. Communications speeds varies between 58-72 Mbps. I am using WIndows 7 32 bit Home Edition. I get these values by opening the network and sharing center and then opening the wireless network connection properties. Signal strengths remains on 5 bars.

I noticed that when i replaced my original wireless card, it had two connectors for the attenna; however, it seems that the 4965AGN has connections for three antenna wires. they are labeled 1,2 and 3. The original card's antenna connections were not labeled. so I connected the black wire to the same end connector on the 4965AGN card as the original card and the white wire to the same end connector as the original card. Nothing is connected to the center connector on the 4965AGN.

Can anyone tell me (1) do have that the antenna connections correct and (2) how can i increase speeds to over 72 Mbps as N is suppose to provide.

The Intel® Wireless WiFi Link 4965AGN is designed with a 2x2 (2 Transmit/2 Receive) antenna configuration, thereby supporting up to a 300 Mbps data rate.The third, middle connector is auxilliary.Please see the product brief and the comment below about antennas.Although the latter discusses installing and upgrading, the concept applies to manipulating antennas.Another community member seemed to find 802.11n configuration settings that enabled his AP/router to connect at higher data rates.

Specifically the Intel® WiFi Link 5300 and the Intel® Centrino® Ultimate-N 6300 have the same electrical requirements. However the 5300 comes in both a minicard and half minicard form factor. The 6300 comes in the half minicard form factor only. Some laptops do not recognize the half minicard adapter. Although it may appear to fit the adapter may not work with the laptop.

The Intel® Centrino® Wireless-N 1000 does not support 5GHz or 802.11a. Both the 5300 and 6300 support 5GHz. If you are looking to replace the 5300 and need to use 5GHz this would not be a good choice.

Another point I need to mention here is that many OEMs prohibit the replacement of the wireless adapter and will not recognize any adapter other than the one originally installed in the laptop. This is true of Lenovo. You will need to contact them to replace the wireless adapter.

Finally got this figured out. In case others have the same problem as I did (i.e., PC wouldn't connect at more than 54Mbps/wireless-G speeds) and want to avoid hours of frustration and deadends... To summarize what I did to get this to work

1. Have current Intel driver (on their website); Lenovo had not installed current driver on my new laptop; oh well2. Set router to 20/40 Auto channel width, mixed n/g3. Turn on WPA2/AES encryption4. Enable WMM and QoS on router (QoS was already on for me, but people on Intel forum told me to check it was on so sure it must do something good)

Step 4 worked magic - went from 54Mbps to 270Mbps in a hurry. Speed fluctuates a bit it seems but still a vast improvement.

Thanks for the information. Unfortunately, the changes I made to my router to the settings listed in your post did not work. I also changed routers and still have the same problem. I now an connected to d-link DIR-625. My settings correspond with your post but I only get 65 Mbps. I have a clear path to the router and the router is only about 10 feet away.

Since I am experiencing basically the same problem with two different routers, could there be some issue with the card - I have updated it to the latest driver - or my computer?

I've had a similar issue with the 4965AGN that's onboard in my Acer Aspire 5920 laptop. It won't provide anything more than 65 mpbs no matter what I do/try. Other computers on my local network connect no problem at speeds > 150mpbs but the 4965 refuses to seemingly. I have the latest drivers, have tried all the settings mentioned in http://www.intel.com/support/wireless/sb/CS-030709.htm and it just won't step up. (Interestingly, the "Throughput Enhancement" setting is not an option that's available for setup........).